[...] and the valley below seems far away. [Gandalf] looked on it and saw that, whereas it had once been green and fair, it was now filled with pits and forges. Wolves and orcs were housed in Isengard [...]. Over all his works a dark smoke hung and wrapped itself about the sides of Orthanc.

When you first enter the biome you get the achievement "Vale of the Wizard".

It is suggested that good players do not go into this biome unless they are well prepared. The land is crawling with evil: there are lots of Uruks and their Wargs about, as well as Isengard Snagae (some atop Wargs), Dunlendings, and their warrior counterparts. Also, orcs do not receive debuffs here.

The biome is notable as it contains one of the first fixed structures in the mod that is not a mountain, the Ring of Isengard, a wall around part of Nan Curunír with a gate at the road.

Uruks - orcs bred with men by Saruman to be stronger, smarter, and resistant to sunlight. They are powerful, well-armoured, and formidably armed with Uruk Equipment. The Uruks are a deadly force against good players.

Uruk Berserkers - Uruks that are larger, stronger, faster, and overall harder to kill than their counterparts. They are armed with deadly Uruk Berserker Scimitars and are considered to be the strongest orcs in the game. They also wear a distinctive helmet emblazoned with the white hand of Saruman.

Uruk Sappers - Uruks armed with deadly Orc Bombs, which were invented by Saruman. After their bomb is used, they attack with a scimitar.

Uruk Wargs (can be ridden) - evil wolves allied with the Uruks. They can be ridden by Snage, attack on their own, or carry bombs (the latter is only true if a player hired the Wargs, or during an invasion).

Uruk Chieftains - traders and leaders of the fearsome Uruks from whom all of the above can be hired.

Dunlendings - wild and somewhat primitive men who hate the men ofRohan, whom they call 'Strawheads', for driving them from the plains. They carry wooden, stone, or, rarely, iron weapons, and can also wield clubs, hoes, tridents, or other tools of labor. They give easy alignment for Rohan (and others) as they are easy to kill.

The Ring of Isengard is a circular structure that generates around the Isengard waypoint, enclosing a large chunk of Nan Curunír. It is a large wall of stone brick, with a large portcullis and gate where the wall meets the road. It was added secretly in Beta 26 to make building Isengard easier, and is considered to be the first major structure to be added to the mod. Eventually, when major structures come into the mod, the tower of Orthanc will stand in the center of the biome.

The valley mainly consists of patches of grass and dirt. Large boulders are also found, some of which consist of waste blocks. Trees that spawn here are: oak (normal and large), spruce and an occassional willow tree. Although once a fair land, many charred, dead oak and spruce trees bear witness of the destructive nature of the lands inhabitants. Fire has burnt grass and dirt into useless waste.